Lock



Nov. 2'3 ,19ze. 1,6o8,46s

' N. B. HURD LOOK Filed April 21, 1926 IIHIIIIIIII! IL- Imgnm mur o ATTORNEYJ.

Patented Nov. 23, 1926.

UNITED .s TATi-:S

- PATENT NORMAN B. iI-IURD, OF :BBITAIIL GONNECTICUT, JLASSIGIQIOB, 'EO IEEE AMEBICAKN GONNECTIGUT.

coNNnc'rIeUr, .A .eoronnmion Yor .'LOCK.

Application 'med 51111121, 1926. 'Serial No; 108,419.

My invention relates to a'loekand particularly Ato one em'bodying ran improved shut out'means.

It is the prmcip'al'olo'ject of the invention to proi'fi'de a lock 4With*improvedshulrout means kfor preventing a person suppliedfonly With a speciallkey ifromrretracting thelocking'b'olt and lateh-boltjbutpermitting the specialfkey to be employed to=retract the latch-bolt When' the 'looking bolt is retraeted.

'In .the draviings 'Whieh show, :for illustrative'purposes only, a-Vpreferred form' of y the inventi'on-- Fig. 1 is a side'viewof a. lookillustrating theinventijon, the cover' plate being removed to show interior Iconstruotion;

Fig. 2 is-a .fragmentaiy view'similar-'to Fig. 1 but illustrating: parts in :different positions;

Fig. 3is a rear view of ia looking bolt and tumloler shown in Figs. 1 and 2,'

Fig. 4 is an edgeviewrof the lockingfbolt shown in Fig. 3. v.

fIn said drawings 5 indicates-a ilook case, and 6 'the face-plate to .be atta-chedtoflthe edge of a door. A .lockingbolt t7jmay'fhe slidably guided'throug'h anopening in -the face-plate, as indicated 'at *8, and *the :rear endv of the locking'bolt may be supportedlby means of a link^9pivoted tothe case at 10 and by means of ailoose'connectiompivote i to the 4pin 111 carriedlby the lockingbolt. The looking bolt 7, at'the rear side, carres a 'tumbler 12 pivoted thereto atP13, "and pressed into the position shown* in the drawmgs by means o a sprng '114. 'The tumbler may carry a'projection 15 to engage inifront of and in rear of a stump 16 oirthejinsideV of the look case. y y

17 indicates aV Cylinder tlook of 'a usu-al form, the rotatable plug of Which carries at .the inner end, a-ro'll-baek 18. The roll-back isformed so as to slidably'hold a'finger or plate 19, Which is normally springupressed inw'ardly :into the position shown 'in Fig. l. By means of :a longkey, whic'hlmayl'be referredfto as a-maidskey, the finger-plate- 1'9 may be .extended or ;proj ected outwardly into the position shown'in FigLQ 'for aipurpose'to :fbe 'later described. A similar cylinder lock and rolllback is more fully described in Voight Patent, No. 1,099,105, dated Julie 2, 1914. The cylinder lock is :0 positioned that the roll-back may be rotated-'asby means-of a short key Qplate 119- not being projected by sueh-s'hortkey) to depress the' tumblerl from-the positionshown in-Fig. tl-so -asJto-'clearithelug 15 fromthe stumpul, and -fui'therrotation of the plug and roll-back AWill Lproject the Floeking bolt 7 yuntil the lIng *l-engages the opposite side of f stump 416 'to hold the looking bolt rin projected i position. With 'the 1 finger 19 -still in retracted position, 'the roll-bak may *be rotated in* the opposite direction -so -as to depress' the-tumbler 112 .and retract the looking bolt 17. i

20 indi'cates a latch-bolt normally spring pressed outwardly asloyIneans-of'aV spring 21, and this latch-bolt norm-allyfmay he retracted I:by means of '-a' '-knob mechanism 22. The Llever *mechanism is interposed between the latchlbolt 20 4and the rollibaolk on lthe cylinder lflock so*that When-lthelloeking bolt 7 is .in yretraotedposition, theilatoh bo'lt'QO y may be retracted by the e linder lock-means retract-thelatchibolt 20. "NoWfif-the rollback 18' berotated in a eounterelookwise di*- rection, as viewed in Fig. 11, the roll-back Will'engagetheturnller 12 and the :looking bolt 7 ast to project y the same into the 1position-shown 'in Figul'. Movement of :the looking bolt I7 yinto 1 the projeeted position thus-removes theleverv fromlthe Vpath of :movement of the Troll-loaek, 'and of .course '-When'the looking bolt-is projected the cyl- -inder i* lock cannot: he e-lnployedtoretract the 'latohibolti and, since 'the Jlocki ng H'bolt is .in 'projected position; the door cannot-fbe opened 'from-'either the insideV or the outside. 'With :the looking 'bolt l'in 1*projected position, as shown 'in '2, the 'roll-bank may 1'be zro- *tated in a 'cl'ockwi'se direction, 'as Viervied flin Fig. 2, so as to again actuate the tumbler and retract the looking bolt, provided, of course, the extensible plate 19 is not projeoted. Those persons, Who may have authority lto enter the'door When the lookingl bolt is retra'oted, are furnished With-'long keys Whioh,-vvhen inserted in the cylinder look'so as-to rotate'the plug and roll-back,

. project the-plate 19 into the position shown in Fig. 2. If the looking bolt be in retracted position, the projecting plateV 19 does notV alfeot the ability of the roll-back todepress the lever 23 and retraot the latoh-holt 20 but, When the looking bolt is in projeoted position,- -the lever 23 is out 'of the range of moveinent'of the roll-back and plate 19, and the'plate 19, upon rotation of theroll-baok ina olookwise direction, Will :abnt some 'partI such as the looking bolt, and the rotation of the roll-back necessary for depressing the tumbler and Withdravving or retraoting'thc looking bolt isthns prevented; It Will therefore be seen that a personsuppliedonly*ivith a long key cannot enter the door so long a 'I Under ordinary conditions With the looking bolt in rethe' looking bolt is projeoted.

tracted position, either the long key or the short pass-key may be employed for retraetingthe latch-bolt. i

- qWhile the invention has been desoribedf for gating said tumbler When said looking bolt is in project-edV and retracted positions, a cylinder look-having a roll-back adapted to' ooaot With said tnmbler forrrungating the same, and moving said looking bolt to fprojeoted and retraoted positions, a lat-oh-bolt, lever mechanism carried by said looking bolt and'ooaotingrwith said latoh-bolt for retraoting the latter, said tnmbler serving to engage said lever mechanism for retracting said latch-bolt When said looking bolt is in retracted position, and an extensible member carried by said roll-back and adapted to -abnt said looking bolt for preventing rotation of said roll-backl sniiicient to engage said tumbler for moving said looking bolt When said extensible member isl proje-oted;

2). Ina look, a lock oasing, aslocking bolt therein, a latoh-bolt, lever mechanisincarried by said looking bolt and adapted to retraot said latoh-bolt, a vcylinder lock having a rollvback thereon for moving said looking bolt to projeoted' and retraote'd positions, said rollback serving toengage said. lever mechanism for retraoting said latoh-bolt only When said vlooking bolt isjin Vretracted position, andV extended position.

meanst'carried by said roll-back and adapted to Vcontact With a part of said looking bolt When the latter is in projeoted position, W i'ereby said roll-back is prevented from rotating to retraot-said looking bolt.

3.V Inl a look, a lock oasing, a looking bolt therein, a gated tnmbler for holding said looking bolt in projeoted and retrac-ted positions, a oylinderlock having a roll-back normally adapted tov ooaot with said tumbler and looking bolt fornmoving the latter to proieoted and retraotod'lfiositions, and an el'itensible member carried by said rollback and adapted to abut a partofsaid looking bolt for preventing engagementv of said roll-back With said tnmbler When said extensible member is projeoted.

4. In a lock,-a look casing, a looking boltV movable therein, a latch-bolt,'a cylinder look having a roll-back therein for moving said looking bolt to projected and retracted positions, said roll-back serving to retraot said latoh-bolt When said looking bolt 'is in retraoted position, and means carried by said roll-back and adapted to be .projeoted so 'as to contact With apart of said looking bolt, When the latter is projected, so as to prevent rotation of said roll-back and thus prevent movement of said latoh-bolt and looking bolt by, said roll-back, i

5. in a look, a look oasing, a latch-bolt there-in, a vcylinder look, a roll-back thereon,

lmeans for permitting said roll-back to retract said latch-bolt, extensible means on said roll-back, abutment means Within said oasing and adapted to be engaged by said eXtensible means on said roll-back for preventing rotation thereof for retracting said latoh-bolt. v

6,111 a lock, a look oasing, aY lookingv bolt movable in said casing, a latch-bolt, lever mechanism to aotuate said latoh-bolt, a oylinder'lo'ok oarrying a roll-back adapted to engagesaid lever mechanism for retraoting said latch-bolt When said looking bolt is in retraoted position, and' extensible ymeans on said roll-back and adapted to abut said looking bolt for preventing'rotation of said rollback, Whereby said looking bolt cannot be retraoted When said extensible means is 'in 7. Inn a look, a lock oasing, a lookingbolt therein, a cylinder lock having a roll-back adapted to move said looking .bolt to projeotedV and fretraoted pos'it files; and an extensible member Vcarriedhby said roll-back and adapted, When extended, to abut apart in said voasing for preventing sufiioient rotation of said roll-back to retraot said vlocking'bolt.v i

NORMAN B; I-IURD. 

